Improvement in lamp-chimneys



'BROWN rFRANKISH.

Lamp Chimney.

Patented May 29, 1866'.

N. PETERS. Pmwmhagmphef. wnningmn, n. C.

UNITED STATES PATENT OEEICE.

V. W. BROWN, OF OAMDEN, NEW JERSEY, AND D. FRANKISH, OF PHILA- DELPHIA, PENNSYLVANIA.

IMPROVEMENT IN LAMP-CHIMNEYS.

Specification forming part of Letters Patent N0. 55,054, dated .Ma-y 29, 1866.

To all whom it may concern Beit known that we, VALENTINE W. BROWN, of Camden, New Jersey, and D. FRANKISH, otl Philadelphia, Pennsylvania, have invented an Improved Lamp-Chimney; and we do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawings, and to the letters ot' reference marked thereon.

Our invention consists of a lamp-chimney iiattened or depressed at one side, so that the portion thus depressed may act as a reiiector to direct the rays ot' light mainly to the opposite side of the lamp. t

On reference to the accompanying drawings, which form a part of this specication, Figure l is an exterior view of our improved lampchimney; Fig. 2, a section on the linc l 2, Fig. l, and Fig. 3, a section on the line 3 4, Fig. 2.

A glass chimney, A, is blown in the ordinary manner, and while in a heated state pressure is applied to one side, so as to make a depression which presents a convex surface on the inner side, or in place ot a depression the chimney may be simply iattened on one side, as shown in Figs. 2 and 3.

In chimneys of the usual form the light is distributed equally in all directions, so that there is as much light thrown` toward a wall, or in a direction where it is notrequired, as toward the portion of the room which it is especially desired to illuminate.

We have found that by flattening one side of the chimney, as above described, the amount of light directed toward the opposite side ot' the chimney is greater than could be obtained by the use of chimneys of the ordinary construction. Ve have also found that if the liaitencd side of the chimney is ground or otherwise rendered semi-opaque the amount of light reflected toward the opposite side ofthe chimney is greatly increased.

It will be seen that by the use otthis chimney the greater portion of the light maybe directed toward any desired point instead ot beingdistrilmted in everydirection and wasted, as with the ordinary chimney.

We do not desire to claim a chimney one side of which is ground or otherwise rendered semi-opaque, as such a chimney is shown in the patent granted to E. B. Reqna, February 24, 1863; but

We claim as our invention and desire to secure by Letters Patent- The chimney A, having a portion at X flattened or depressed, as and for the purpose described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

V. IV. BROWN. D. FRANKISH.

Witnesses GEAELEs E. FOSTER, W. J. R. DELANY. 

